Yeah, as Philip Kendall already pointed out, this is very much encouraged. For your goal, I'd suggest probably waiting a bit to post your own answer to give others a chance to give their own view without being impacted by yours, but as long as it's a good question for the site there is absolutely no problem with posting your own answers.
This is also how canonical questions work. Sometimes there are a lot of similar questions asked by people starting out that don't really understand the entirety of a concept so the questions kind of dance around the core issues. To avoid lots of semi-duplicates, a knowledgeable user can post a question that can cover all the related questions being asked and then also answer it themselves (and so can others). This ends up acting as a great resource for people because it covers a topic that is of general interest but most people who would be interested in it might not have the knowledge to form the question as well as someone with experience.
If you ever see a topic you think would be of general interest, would be a good fit for the site and hasn't been asked yet. Please feel free to make a question for it and answer it yourself to get it started. That's how the site is intended to work. It is a repository of information in Q/A format. Questions don't have to be asked to help the OP, they can be intended to help others.